请选择错误类型：

请描述一下这个错误：

In an experiment, volunteers walked individually through a dark, abandoned theater. Half of the volunteers had been told that the theater was haunted and the other half that it was under renovation. The first half reported significantly more unusual experiences than the second did. The researchers concluded that reports of encounters with ghosts and other supernatural entities generally result from prior expectations of such experiences.

Which of the following, if true, would most seriously weaken the researchers` reasoning?

A

None of the volunteers in the second half believed that the unusual experiences they reported were supernatural.

分析A选项

xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx

B

All of the volunteers in the first half believed that the researchers’ statement that the theater was haunted was a lie.

分析B选项

xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx

C

Before being told about the theater, the volunteers within each group varied considerably in their prior beliefs about supernatural experiences.

分析C选项

xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx

D

Each unusual experience reported by the volunteers had a cause that did not involve the supernatural.